Quote: lime render for façades
E.g.: lime render on a stone facade, restoration of an old house (Grund, Old Town)
For an older façade, first identify masonry, joints and existing finishes. Then ask why the proposed lime mortar suits that combination. Visible stone or an old building alone cannot determine the product, mix or removal method.
Identify lime and mortar
Saint-Astier distinguishes air limes, including CL, from natural hydraulic limes NHL. A lower-class NHL is still hydraulic. Request binder or mortar references and constituents rather than choosing by colour or the word natural.
Assess moisture and compatibility
Buildwise identifies several required render properties and possible hygrothermal study for heritage restoration. Investigate moisture sources and compatibility with stone, joints and old layers. Vapour-permeable render alone does not treat every source of water.
Decide retention before removal
Map sound, weak and historically important areas. Define a trial method for necessary removal without assuming all layers must go. Specify joint and masonry repairs; rendering and repointing exposed stone are different services.
Approve appearance and application conditions
Request colour, sand and texture samples and agree comparison after drying. Define layers, protection and timing for the actual mortar and weather. One universal curing period cannot schedule every lime product.
Prepare heritage procedures
INPA states that restoration support concerns nationally or municipally protected buildings and requires an application before work. Check building status and the proposal with the relevant bodies beforehand. Mentioning lime in a quote does not ensure a grant.
Plan upkeep and future coatings
Request references to keep and compatible coatings if painting is planned. Check all layers rather than allowing or excluding paint by trade name alone. Record reservations and local repair arrangements.
Indicative prices in Luxembourg
On quotation
Cost depends on what can remain, preparation and the desired finish. Compare matching areas and interventions: old-layer removal, repairs, render and decorative details. Do not assume a fixed percentage premium over cement.
Subsidies and grants
No grant is deducted from the budget shown here. If a quote mentions support, request the exact scheme and confirmation of your eligibility before including it in financing.
Frequently asked questions
Does lime suit every old wall?
The choice must suit the wall and its layers. Age alone is insufficient.
Is NHL an air lime?
No. NHL means natural hydraulic lime.
Does render solve rising moisture?
Not by itself. Identify the moisture source and suitable treatment.
Must all existing cement be removed?
Assess condition, compatibility and removal risks before defining scope.
Is heritage support available?
An application may be relevant depending on protection and work. Check INPA conditions before starting.